﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace APP
{
    internal class Class1
    {
        public int a;
        public int b;
        public int c;
        public int add(int a1, int b1)
        {
            return (a1 + b1);
        }
        public int sub(int a1,int b1)
        {
            return a1 - b1;
        }
    }
}
